Portolan Capital Management, LLC

In its 13F for Q1 2024 (holdings as of March 31, 2024, filed May 15, 2024), Portolan Capital Management, LLC reported 116 stock positions worth $1.3 billion. Its top holding was Super Micro Computer (SMCI) at 3.5% of the portfolio, followed by Celestica (CLS, 3.4%) and Lantheus (LNTH, 2.5%). Compared with Q4 2023, it opened 24 new positions, sold out of 35, added to 53 and reduced 38. The biggest buy was a new position in Micron Technology (MU) and the biggest sale Super Micro Computer (SMCI, shares −81%).

Most Recent 13F
Q2 2026
Location
BOSTON, MA
CIK
0001350290
Portfolio Value
$1.3B (Q1 2024)
SEC Filing
0001104659-24-061786 ↗ filed May 15, 2024

Holdings Value

0$1.0B$2.0B$3.0B Q1 2024: $1.3B $1.3B Q1 2024 Q2 2024: $1.2B Q2 2024 Q3 2024: $1.4B Q3 2024 Q4 2024: $1.5B Q4 2024 Q1 2025: $1.3B Q1 2025 Q2 2025: $1.6B Q2 2025 Q3 2025: $1.8B Q3 2025 Q4 2025: $1.9B Q4 2025 Q1 2026: $1.9B Q1 2026 Q2 2026: $2.7B Q2 2026

Holdings 116 stocks · $1.3B
SMCI Super Micro Computer Inc. 3.47% 45,080 $45.5M Reduce -81.4%
CLS Celestica Inc. 3.42% 1,000,489 $45.0M Reduce -18.9%
LNTH Lantheus Holdings Inc. 2.49% 525,742 $32.7M Add +23.1%
ELF Elf Beauty Inc. 2.49% 166,704 $32.7M Reduce -49.5%
BIO Bio-Rad Laboratories-A 2.40% 90,992 $31.5M Add +58.9%
HNST The Honest Co. Inc. 2.31% 7,488,703 $30.3M Reduce -0.9%
KTOS Kratos Defense & Security 2.22% 1,584,691 $29.1M Add +115.3%
QTRX Quanterix Corp. 2.09% 1,162,829 $27.4M Reduce -10.3%
ZETA Zeta Global Holdings Corp. Class A 1.96% 2,349,462 $25.7M Add +77.8%
WDC Western Digital Corp. 1.95% 375,140 $25.6M Add +174.2%
MOD Modine Manufacturing Co. 1.95% 268,900 $25.6M Reduce -55.0%
UTHR United Therapeutics Corp. 1.94% 110,922 $25.5M Add +20.8%
SG Sweetgreen Inc. Class A 1.92% 997,525 $25.2M Add +1.4%
CSTL Castle Biosciences Inc. 1.76% 1,043,410 $23.1M Add +43.2%
NVT Nvent Electric PLC 1.64% 285,196 $21.5M Add +253.4%
IIIV I3 Verticals Inc. Class A 1.61% 925,182 $21.2M Add +223.5%
BIDU Baidu Inc. - Spon ADR 1.54% 192,422 $20.3M Add +92.4%
AAOI Applied Optoelectronics Inc. 1.51% 1,434,900 $19.9M Reduce -6.8%
WKME Walkme Ltd. 1.49% 2,272,092 $19.5M Add +22.0%
CROX Crocs Inc. 1.46% 133,196 $19.2M Add +23.9%
TGLS Tecnoglass Holdings Inc. 1.45% 366,228 $19.1M Reduce -24.0%
MU Micron Technology Inc. 1.43% 159,744 $18.8M New
AEM Agnico Eagle Mines Ltd. 1.42% 311,675 $18.6M Reduce -28.4%
NTRA Natera Inc. 1.40% 201,218 $18.4M Add +117.7%
SMWB Similarweb Ltd. 1.40% 2,040,602 $18.4M Add +6.7%
PENG Penguin Solutions Inc. filed as SMART GLOBAL HLDGS INC 1.39% 693,056 $18.2M Add +13.9%
KRUS Kura Sushi USA Inc. Class A 1.30% 148,787 $17.1M Add +98.6%
BLFS Biolife Solutions Inc. 1.23% 871,537 $16.2M Add +67.0%
FOUR SHIFT4 Payments Inc. Class A 1.20% 239,309 $15.8M Add +10.9%
ACMR Acm Research Inc. Class A 1.20% 538,433 $15.7M Reduce -32.6%
STKL Sunopta Inc. 1.19% 2,267,173 $15.6M Reduce -12.9%
BASE Couchbase Inc. 1.18% 590,454 $15.5M Reduce -26.5%
RCM R1 RCM Inc. 1.08% 1,097,612 $14.1M Add +52.5%
PBPB Potbelly Corp. 1.06% 1,145,952 $13.9M New
WRBY Warby Parker Inc. Class A 1.03% 997,884 $13.6M Add +17.6%
SKX Skechers USA Inc. Class A 1.00% 214,075 $13.1M Add +77.6%
INDI Indie Semiconductor Inc. Class A 0.99% 1,843,986 $13.1M Reduce -25.3%
CLBT Cellebrite Di Ltd. 0.97% 1,143,672 $12.7M New
GENI Genius Sports Ltd. 0.96% 2,204,049 $12.6M Reduce -7.5%
META Meta Platforms Inc. Class A 0.94% 25,425 $12.3M Reduce -34.8%
FLEX Flex Ltd. 0.94% 430,205 $12.3M Add +38.6%
SIMO Silicon Motion Technol-ADR 0.94% 159,963 $12.3M New
AU Anglogold Ashanti PLC 0.91% 538,657 $12.0M Add +42.8%
NOG Northern Oil and Gas Inc. 0.90% 296,721 $11.8M Add +74.4%
INVE Inve Technologies Inc. filed as IDENTIV INC 0.87% 1,442,663 $11.4M Add +59.0%
GDS GDS Holdings Ltd. - ADR filed as GDS HLDGS LTD 0.84% 1,663,662 $11.1M New
VRT Vertiv Holdings Co. Class A 0.81% 129,923 $10.6M Reduce -48.3%
TTWO Take-Two Interactive Softwre 0.78% 69,117 $10.3M Reduce -6.6%
AIG American International Group 0.76% 127,177 $9.9M New
MTRX Matrix Service Co. 0.72% 723,318 $9.4M Add +16.7%
KMPR Kemper Corp. 0.69% 146,171 $9.1M New
ALT Altimmune Inc. 0.69% 887,255 $9.0M New
RPAY Repay Holdings Corp. 0.68% 815,507 $9.0M Add +36.0%
RPRX Royalty Pharma PLC Class A 0.67% 288,378 $8.8M Add +92.5%
BV Brightview Holdings Inc. 0.65% 720,380 $8.6M New
FORR Forrester Research Inc. 0.65% 395,638 $8.5M Add +166.1%
STNG Scorpio Tankers Inc. 0.65% 119,033 $8.5M Add +164.1%
NRDY Nerdy Inc. 0.65% 2,922,160 $8.5M Add +29.8%
ARCT Arcturus Therapeutics Holdin 0.63% 244,659 $8.3M Add +67.7%
CELH Celsius Holdings Inc. 0.63% 99,262 $8.2M Add +51.5%
TTMI TTM Technologies 0.62% 517,943 $8.1M New
EGO Eldorado Gold Corp. 0.62% 575,457 $8.1M Add +78.3%
VKTX Viking Therapeutics Inc. 0.61% 97,583 $8.0M Reduce -71.3%
ENVA Enova International Inc. 0.59% 123,513 $7.8M Add +38.6%
HDSN Hudson Technologies Inc. 0.57% 685,549 $7.5M Reduce -26.1%
AXTI Axt Inc. 0.56% 1,596,232 $7.3M Add +215.9%
CTOS Custom Truck One Source Inc. 0.55% 1,244,282 $7.2M Add +19.4%
MXCT Maxcyte Inc. 0.55% 1,721,777 $7.2M Reduce -37.5%
AVAV Aerovironment Inc. 0.54% 46,258 $7.1M New
SKY Champion Homes Inc. filed as SKYLINE CHAMPION CORPORATION 0.52% 80,647 $6.9M Reduce -2.2%
EVER Everquote Inc. Class A 0.52% 367,241 $6.8M Reduce -34.7%
DELL Dell Technologies -C 0.52% 59,569 $6.8M Reduce -38.9%
ORCL Oracle Corp. 0.50% 52,313 $6.6M Add +85.4%
GFL GFL Environmental Inc.-Sub VT 0.50% 189,386 $6.5M Add +48.7%
BELFB Bel Fuse Inc. Class B 0.49% 107,697 $6.5M Reduce -43.5%
QNST Quinstreet Inc. 0.48% 360,605 $6.4M Reduce -42.1%
CRESCENT PT ENERGY CORP 0.48% 776,860 $6.4M Add +151.9%
MRVI Maravai Lifesciences Hldgs-A 0.45% 680,456 $5.9M New
PAYO Payoneer Global Inc. 0.45% 1,212,317 $5.9M Reduce -35.4%
CDMO Avid Bioservices Inc. 0.44% 866,885 $5.8M Add +97.7%
INSW International Seaways Inc. 0.42% 102,803 $5.5M New
TTGT Techtarget Holdings Inc. 0.41% 162,883 $5.4M New
CYRX Cryoport Inc. 0.40% 295,652 $5.2M New
APLD Applied Digital Corp. 0.39% 1,206,320 $5.2M Reduce -43.2%
DOCN Digitalocean Holdings Inc. 0.38% 132,137 $5.0M Reduce -51.7%
OVERSEAS SHIPHOLDING GROUP-A 0.38% 771,227 $4.9M Add +9.2%
NVEI Nuvei Corp.-Subordinate VTG 0.37% 154,989 $4.9M Reduce -44.9%
NVGS Navigator Holdings Ltd. 0.36% 309,005 $4.7M Add +13.3%
UCTT Ultra Clean Holdings Inc. 0.35% 99,992 $4.6M New
RDNT Radnet Inc. 0.35% 93,981 $4.6M Reduce -34.1%
SMTC Semtech Corp. 0.35% 165,917 $4.6M New
GENK Gen Restaurant Group Inc. 0.33% 365,662 $4.3M Add +32.7%
NMM Navios Maritime Partners LP 0.32% 98,902 $4.2M New
AMPH Amphastar Pharmaceuticals Inc. 0.30% 91,005 $4.0M Reduce -38.7%
AZZ Azz Inc. 0.30% 51,323 $4.0M New
DIBS 1STDIBS.COM Inc. 0.30% 654,677 $3.9M Reduce -13.0%
OPK Opko Health Inc. 0.30% 3,241,418 $3.9M Add +95.1%
GTES Gates Industrial Corp. UK Ltd. 0.29% 217,032 $3.8M New
RELY Remitly Global Inc. 0.28% 175,827 $3.6M New
ALRM Alarm.com Holdings Inc. 0.28% 50,201 $3.6M New
DOUG Douglas Elliman Inc. 0.27% 2,215,469 $3.5M Add +14.4%
TLS Telos Corporation 0.23% 737,619 $3.1M Reduce -50.9%
HBIO Harvard Bioscience Inc. 0.23% 697,840 $3.0M Add +3.8%
PRCH Porch Group Inc. 0.21% 631,459 $2.7M Reduce -80.3%
LUXE Luxexperience BV filed as MYT NETHERLANDS PARENT B V 0.17% 711,995 $2.3M Add +11.8%
MSFT Microsoft Corp. 0.17% 5,302 $2.2M Add +0.8%
LTRX Lantronix Inc. 0.16% 578,180 $2.1M Add +31.0%
ICAD Icad Inc. 0.15% 1,208,266 $1.9M Reduce -2.0%
CWST Casella Waste Systems Inc. Class A 0.12% 15,691 $1.6M No change
PGY Pagaya Technologies Ltd. Class A 0.12% 149,584 $1.5M New
GOOG Alphabet Inc. Class C 0.07% 6,172 $940K Add +17.8%
THCH TH International Ltd./Cayman 0.07% 776,241 $893K Reduce -62.5%
SLM SLM Corp. 0.07% 40,419 $881K Add +7.0%
BXC Bluelinx Holdings Inc. 0.04% 4,229 $551K Reduce -8.6%
PLBY Playboy Inc. filed as PLBY GROUP INC 0.02% 289,354 $304K New
RELL Richardson Elec Ltd. 0.01% 11,950 $110K Reduce -97.4%

Portfolio Sells Q4 2023 → Q1 2024
SMCI Super Micro Computer Inc. Reduce -81.4% 3.47% −2.57
ELF Elf Beauty Inc. Reduce -49.5% 2.49% −1.68
MOD Modine Manufacturing Co. Reduce -55.0% 1.95% −1.17
AAOI Applied Optoelectronics Inc. Reduce -6.8% 1.51% −1.09
PDD PDD Holdings Inc. Sold out 0.00% −1.03
QTRX Quanterix Corp. Reduce -10.3% 2.09% −1.01
BILL Bill Holdings Inc. Sold out 0.00% −0.90
FSLY Fastly Inc. Class A Sold out 0.00% −0.90
APLD Applied Digital Corp. Reduce -43.2% 0.39% −0.86
ASUR Asure Software Inc. Sold out 0.00% −0.85
INDI Indie Semiconductor Inc. Class A Reduce -25.3% 0.99% −0.76
HIMS Hims & Hers Health Inc. Sold out 0.00% −0.73
RH RH Sold out 0.00% −0.72
COMP Compass Inc. Class A Sold out 0.00% −0.67
AEM Agnico Eagle Mines Ltd. Reduce -28.4% 1.42% −0.67
PRCH Porch Group Inc. Reduce -80.3% 0.21% −0.65
DCGO Docgo Inc. Sold out 0.00% −0.65
BELFB Bel Fuse Inc. Class B Reduce -43.5% 0.49% −0.62
METC Ramaco Resources Inc. Class A Sold out 0.00% −0.61
MXCT Maxcyte Inc. Reduce -37.5% 0.55% −0.58
AMKR Amkor Technology Inc. Sold out 0.00% −0.58
APPS Digital Turbine Inc. Sold out 0.00% −0.55
RELL Richardson Elec Ltd. Reduce -97.4% 0.01% −0.53
HDSN Hudson Technologies Inc. Reduce -26.1% 0.57% −0.52
AMPH Amphastar Pharmaceuticals Inc. Reduce -38.7% 0.30% −0.50
DOCN Digitalocean Holdings Inc. Reduce -51.7% 0.38% −0.49
TGLS Tecnoglass Holdings Inc. Reduce -24.0% 1.45% −0.47
AAN The Aaron's Co. Inc. Sold out 0.00% −0.47
OLPX Olaplex Holdings Inc. Sold out 0.00% −0.43
AGL Agilon Health Inc. Sold out 0.00% −0.42
PAYO Payoneer Global Inc. Reduce -35.4% 0.45% −0.41
BASE Couchbase Inc. Reduce -26.5% 1.18% −0.40
GENI Genius Sports Ltd. Reduce -7.5% 0.96% −0.33
PACK Ranpak Holdings Corp. Sold out 0.00% −0.32
HUCK Huckleberry AI Inc. Sold out 0.00% −0.30
KOS Kosmos Energy Ltd. Sold out 0.00% −0.28
NVEI Nuvei Corp.-Subordinate VTG Reduce -44.9% 0.37% −0.27
META Meta Platforms Inc. Class A Reduce -34.8% 0.94% −0.27
TTWO Take-Two Interactive Softwre Reduce -6.6% 0.78% −0.26
MGPI MGP Ingredients Inc. Sold out 0.00% −0.25
THCH TH International Ltd./Cayman Reduce -62.5% 0.07% −0.25
CONTEXTLOGIC INC - A Sold out 0.00% −0.25
VRT Vertiv Holdings Co. Class A Reduce -48.3% 0.81% −0.25
TLS Telos Corporation Reduce -50.9% 0.23% −0.25
BAND Bandwidth Inc. Class A Sold out 0.00% −0.24
IMMR Immersion Corporation Sold out 0.00% −0.22
SKIN Skinhealth Systems Inc. Sold out 0.00% −0.22
QNST Quinstreet Inc. Reduce -42.1% 0.48% −0.21
SOLO BRANDS INC Sold out 0.00% −0.20
TASK Taskus Inc. Class A Sold out 0.00% −0.19

Portfolio Buys Q4 2023 → Q1 2024
MU Micron Technology Inc. New 1.43% +1.43
WDC Western Digital Corp. Add +174.2% 1.95% +1.32
NVT Nvent Electric PLC Add +253.4% 1.64% +1.22
IIIV I3 Verticals Inc. Class A Add +223.5% 1.61% +1.08
PBPB Potbelly Corp. New 1.06% +1.06
CLBT Cellebrite Di Ltd. New 0.97% +0.97
SG Sweetgreen Inc. Class A Add +1.4% 1.92% +0.95
SIMO Silicon Motion Technol-ADR New 0.94% +0.94
ZETA Zeta Global Holdings Corp. Class A Add +77.8% 1.96% +0.94
KTOS Kratos Defense & Security Add +115.3% 2.22% +0.91
NTRA Natera Inc. Add +117.7% 1.40% +0.90
GDS GDS Holdings Ltd. - ADR New 0.84% +0.84
KRUS Kura Sushi USA Inc. Class A Add +98.6% 1.30% +0.81
BIO Bio-Rad Laboratories-A Add +58.9% 2.40% +0.78
AIG American International Group New 0.76% +0.76
KMPR Kemper Corp. New 0.69% +0.69
ALT Altimmune Inc. New 0.69% +0.69
BV Brightview Holdings Inc. New 0.65% +0.65
TTMI TTM Technologies New 0.62% +0.62
CROX Crocs Inc. Add +23.9% 1.46% +0.58
AVAV Aerovironment Inc. New 0.54% +0.54
SMWB Similarweb Ltd. Add +6.7% 1.40% +0.51
BIDU Baidu Inc. - Spon ADR Add +92.4% 1.54% +0.50
BLFS Biolife Solutions Inc. Add +67.0% 1.23% +0.49
AXTI Axt Inc. Add +215.9% 0.56% +0.45
MRVI Maravai Lifesciences Hldgs-A New 0.45% +0.45
INSW International Seaways Inc. New 0.42% +0.42
RCM R1 RCM Inc. Add +52.5% 1.08% +0.41
TTGT Techtarget Holdings Inc. New 0.41% +0.41
STNG Scorpio Tankers Inc. Add +164.1% 0.65% +0.41
CYRX Cryoport Inc. New 0.40% +0.40
CSTL Castle Biosciences Inc. Add +43.2% 1.76% +0.39
PENG Penguin Solutions Inc. Add +13.9% 1.39% +0.38
UCTT Ultra Clean Holdings Inc. New 0.35% +0.35
SMTC Semtech Corp. New 0.35% +0.35
NOG Northern Oil and Gas Inc. Add +74.4% 0.90% +0.35
SKX Skechers USA Inc. Class A Add +77.6% 1.00% +0.34
NMM Navios Maritime Partners LP New 0.32% +0.32
CELH Celsius Holdings Inc. Add +51.5% 0.63% +0.31
AZZ Azz Inc. New 0.30% +0.30
FORR Forrester Research Inc. Add +166.1% 0.65% +0.30
RPRX Royalty Pharma PLC Class A Add +92.5% 0.67% +0.30
CRESCENT PT ENERGY CORP Add +151.9% 0.48% +0.30
AU Anglogold Ashanti PLC Add +42.8% 0.91% +0.29
GTES Gates Industrial Corp. UK Ltd. New 0.29% +0.29
RELY Remitly Global Inc. New 0.28% +0.28
ALRM Alarm.com Holdings Inc. New 0.28% +0.28
EGO Eldorado Gold Corp. Add +78.3% 0.62% +0.25
ORCL Oracle Corp. Add +85.4% 0.50% +0.24
RPAY Repay Holdings Corp. Add +36.0% 0.68% +0.24

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 148$2.7BVPG, VIRT, TTMI, MOD, QLYS
Q1 2026 144$1.9BMOD, TTMI, CLS, VIRT, AKAM
Q4 2025 155$1.9BTTMI, MOD, CSTL, CLS, AKAM
Q3 2025 119$1.8BMOD, TTMI, ELF, DBRG, CLS
Q2 2025 118$1.6BCLS, KTOS, ELF, AVAV, MOD
Q1 2025 109$1.3BLNTH, SLM, KTOS, GENI, MOD
Q4 2024 131$1.5BLNTH, CLS, SMTC, MOD, HNST
Q3 2024 129$1.4BLNTH, ZETA, KTOS, TLN, CLS
Q2 2024 117$1.2BLNTH, CLS, SMCI, ZETA, KTOS
Q1 2024 116$1.3BSMCI, CLS, LNTH, ELF, BIO